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4be536debe
linux_dsm_epyc7002/fs
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David Chinner 4be536debe [XFS] Prevent free space oversubscription and xfssyncd looping. 
The fix for recent ENOSPC deadlocks introduced certain limitations on
allocations. The fix could cause xfssyncd to loop endlessly if we did not
leave some space free for the allocator to work correctly. Basically, we
needed to ensure that we had at least 4 blocks free for an AG free list
and a block for the inode bmap btree at all times.

However, this did not take into account the fact that each AG has a free
list that needs 4 blocks. Hence any filesystem with more than one AG could
cause oversubscription of free space and make xfssyncd spin forever trying
to allocate space needed for AG freelists that was not available in the
AG.

The following patch reserves space for the free lists in all AGs plus the
inode bmap btree which prevents oversubscription. It also prevents those
blocks from being reported as free space (as they can never be used) and
makes the SMP in-core superblock accounting code and the reserved block
ioctl respect this requirement.

SGI-PV: 955674
SGI-Modid: xfs-linux-melb:xfs-kern:26894a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: David Chatterton <chatz@sgi.com>
2006-09-07 14:26:50 +10:00
..
9p [PATCH] 9p: fix fid behavior on failed remove 2006-07-31 13:28:44 -07:00
adfs [PATCH] adfs error message fix 2006-08-14 12:54:28 -07:00
affs [PATCH] mark address_space_operations const 2006-06-28 14:59:04 -07:00
afs [PATCH] mark address_space_operations const 2006-06-28 14:59:04 -07:00
autofs [PATCH] VFS: Permit filesystem to override root dentry on mount 2006-06-23 07:42:45 -07:00
autofs4 [PATCH] fs: use list_move() 2006-06-26 09:58:18 -07:00
befs [PATCH] Fix BeFS slab corruption 2006-08-06 08:57:48 -07:00
bfs [PATCH] mark address_space_operations const 2006-06-28 14:59:04 -07:00
cifs [CIFS] Do not send Query All EAs SMB when mount option nouser_xattr 2006-08-16 19:44:25 +00:00
coda [PATCH] Remove incorrect unlock_kernel from allocation failure path in coda_open() 2006-07-31 13:28:41 -07:00
configfs configfs: Clear up a few extra spaces where there should be TABs. 2006-06-29 14:43:01 -07:00
cramfs [PATCH] mark address_space_operations const 2006-06-28 14:59:04 -07:00
debugfs Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
devpts [PATCH] VFS: Permit filesystem to override root dentry on mount 2006-06-23 07:42:45 -07:00
efs [PATCH] efs: Remove incorrect unlock_kernel from failure path in efs_symlink_readpage() 2006-07-31 13:28:41 -07:00
exportfs [PATCH] NFS server subtree_check returns dubious value 2006-05-21 12:59:16 -07:00
ext2 [PATCH] ext2: prevent div-by-zero on corrupted fs 2006-08-27 11:01:30 -07:00
ext3 [PATCH] ext3 filesystem bogus ENOSPC with reservation fix 2006-08-27 11:01:30 -07:00
fat [PATCH] mark address_space_operations const 2006-06-28 14:59:04 -07:00
freevxfs [PATCH] freevxfs: Add missing lock_kernel() to vxfs_readdir 2006-07-31 13:28:44 -07:00
fuse [PATCH] fuse: fix error case in fuse_readpages 2006-08-14 12:54:29 -07:00
hfs Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
hfsplus Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
hostfs [PATCH] mark address_space_operations const 2006-06-28 14:59:04 -07:00
hpfs [PATCH] mark address_space_operations const 2006-06-28 14:59:04 -07:00
hppfs [PATCH] VFS: Permit filesystem to perform statfs with a known root dentry 2006-06-23 07:42:45 -07:00
hugetlbfs [PATCH] mmap zero-length hugetlb file with PROT_NONE to protect a hugetlb virtual area 2006-07-10 13:24:21 -07:00
isofs Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
jbd [PATCH] manage-jbd-its-own-slab fix 2006-09-01 11:39:10 -07:00
jffs Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
jffs2 Merge git://git.infradead.org/mtd-2.6 2006-07-03 21:29:08 -07:00
jfs JFS: Fix bug in quota code. tmp_bh.b_size must be initialized 2006-07-28 08:46:05 -05:00
lockd LOCKD: Fix a deadlock in nlm_traverse_files() 2006-08-24 15:51:00 -04:00
minix [PATCH] Fix for minix crash 2006-08-27 11:01:30 -07:00
msdos [PATCH] VFS: Permit filesystem to override root dentry on mount 2006-06-23 07:42:45 -07:00
ncpfs Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial 2006-06-30 15:39:30 -07:00
nfs NFSv4: Add v4 exception handling for the ACL functions. 2006-08-24 15:54:13 -04:00
nfs_common [PATCH] nfsacl: Solaris VxFS compatibility fix 2005-10-11 09:46:54 -07:00
nfsd [PATCH] knfsd: Fix stale file handle problem with subtree_checking. 2006-07-31 13:28:37 -07:00
nls Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
ntfs [PATCH] lockdep: annotate NTFS locking rules 2006-07-03 15:27:08 -07:00
ocfs2 ocfs2: allocation hints 2006-08-07 11:07:01 -07:00
openpromfs [OPENPROMFS]: Rewrite using in-kernel device tree and seq_file. 2006-06-25 23:19:14 -07:00
partitions [DISKLABEL] SUN: Fix signed int usage for sector count 2006-08-26 17:55:55 -07:00
proc [PATCH] /proc/meminfo: don't put spaces in names 2006-08-27 11:01:33 -07:00
qnx4 Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
ramfs [PATCH] NOMMU: Fix execution off of ramfs with mmap() 2006-07-10 13:24:21 -07:00
reiserfs [PATCH] lockdep: annotate reiserfs 2006-08-27 11:01:32 -07:00
romfs [PATCH] mark address_space_operations const 2006-06-28 14:59:04 -07:00
smbfs Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
sysfs [PATCH] lockdep: annotate the sysfs i_mutex to be a separate class 2006-07-12 12:52:54 -07:00
sysv [PATCH] mark address_space_operations const 2006-06-28 14:59:04 -07:00
udf Fix possible UDF deadlock and memory corruption (CVE-2006-4145) 2006-08-22 12:52:23 -07:00
ufs [PATCH] ufs: truncate correction 2006-08-27 11:01:31 -07:00
vfat [PATCH] VFS: Permit filesystem to override root dentry on mount 2006-06-23 07:42:45 -07:00
xfs [XFS] Prevent free space oversubscription and xfssyncd looping. 2006-09-07 14:26:50 +10:00
aio.c spelling fixes 2006-06-26 18:35:02 +02:00
attr.c [PATCH] capable/capability.h (fs/) 2006-01-11 18:42:13 -08:00
bad_inode.c [PATCH] Make most file operations structs in fs/ const 2006-03-28 09:16:06 -08:00
binfmt_aout.c [PATCH] dump_thread() cleanup 2006-01-10 08:01:25 -08:00
binfmt_elf_fdpic.c [PATCH] FDPIC: Add coredump capability for the ELF-FDPIC binfmt 2006-07-10 13:24:22 -07:00
binfmt_elf.c [PATCH] FDPIC: Move roundup() into linux/kernel.h 2006-07-10 13:24:22 -07:00
binfmt_em86.c
binfmt_flat.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
binfmt_misc.c Merge branch 'master' of /home/trondmy/kernel/linux-2.6/ 2006-06-24 13:07:53 -04:00
binfmt_script.c
binfmt_som.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
bio.c [PATCH] Fix missing ret assignment in __bio_map_user() error path 2006-06-17 10:52:12 -07:00
block_dev.c [PATCH] lockdep: fix blkdev_open() warning 2006-08-27 11:01:29 -07:00
buffer.c [PATCH] invalidate_bdev() speedup 2006-07-31 13:28:38 -07:00
char_dev.c [PATCH] add function documentation for register_chrdev() 2006-07-14 21:53:54 -07:00
compat_ioctl.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
compat.c [PATCH] x86_64: Add compat_printk and sysctl to turn off compat layer warnings 2006-06-26 10:48:16 -07:00
dcache.c [PATCH] lockdep: annotate dcache 2006-07-03 15:27:06 -07:00
dcookies.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
direct-io.c [PATCH] lockdep: annotate direct io 2006-07-03 15:27:06 -07:00
dnotify.c [PATCH] Use __read_mostly on some hot fs variables 2006-03-26 08:56:56 -08:00
dquot.c [PATCH] use list_add_tail() instead of list_add() 2006-06-26 09:58:17 -07:00
drop_caches.c [PATCH] drop-pagecache 2006-01-08 20:12:40 -08:00
eventpoll.c [PATCH] eventpoll.c compile fix 2006-08-27 11:01:31 -07:00
exec.c [PATCH] fix up lockdep trace in fs/exec.c 2006-08-27 11:01:32 -07:00
fcntl.c BUG_ON() Conversion in fs/fcntl.c 2006-04-02 13:37:19 +02:00
fifo.c [PATCH] pipe.c/fifo.c code cleanups 2006-04-11 13:53:33 +02:00
file_table.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
file.c [PATCH] alloc_fdtable() expansion fix 2006-07-12 12:52:55 -07:00
filesystems.c [PATCH] fix missing includes 2005-10-30 17:37:32 -08:00
fs-writeback.c [PATCH] zoned vm counters: conversion of nr_unstable to per zone counter 2006-06-30 11:25:36 -07:00
inode.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial 2006-06-30 15:39:30 -07:00
inotify_user.c [PATCH] inotify: fix deadlock found by lockdep 2006-07-31 13:28:41 -07:00
inotify.c [PATCH] inotify (4/5): allow watch removal from event handler 2006-06-20 05:25:19 -04:00
ioctl.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
ioprio.c [PATCH] uninline ioprio_best() 2006-08-21 10:02:50 +02:00
Kconfig Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6 2006-07-13 16:38:58 -07:00
Kconfig.binfmt [PATCH] frv: suppress configuration of certain features for FRV 2006-01-08 20:13:36 -08:00
libfs.c [PATCH] core: use list_move() 2006-06-26 09:58:17 -07:00
locks.c [PATCH] fcntl(F_SETSIG) fix 2006-08-14 13:10:59 -07:00
Makefile [PATCH] devfs: Remove devfs from the kernel tree 2006-06-26 12:25:05 -07:00
mbcache.c [PATCH] Typo fixes 2006-03-28 09:16:08 -08:00
mpage.c [PATCH] writeback: fix range handling 2006-06-23 07:42:49 -07:00
namei.c VFS: Fix access("file", X_OK) in the presence of ACLs 2006-08-24 15:54:58 -04:00
namespace.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
nfsctl.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
open.c [PATCH] ftruncate does not always update m/ctime 2006-06-25 10:01:15 -07:00
pipe.c [PATCH] VFS: Permit filesystem to override root dentry on mount 2006-06-23 07:42:45 -07:00
pnode.c [PATCH] core: use list_move() 2006-06-26 09:58:17 -07:00
pnode.h [PATCH] unbindable mounts 2005-11-07 18:18:11 -08:00
posix_acl.c [PATCH] gfp flags annotations - part 1 2005-10-08 15:00:57 -07:00
quota_v1.c
quota_v2.c [PATCH] sem2mutex: quota 2006-03-23 07:38:11 -08:00
quota.c [PATCH] sem2mutex: quota 2006-03-23 07:38:11 -08:00
read_write.c [PATCH] fs/read_write.c: EXPORT_UNUSED_SYMBOL 2006-07-10 13:24:18 -07:00
readdir.c [PATCH] mutex subsystem, semaphore to mutex: VFS, ->i_sem 2006-01-09 15:59:24 -08:00
select.c [PATCH] fs: sys_poll with timeout -1 bug fix 2006-06-25 10:01:22 -07:00
seq_file.c [PATCH] sem2mutex: fs/seq_file.c 2006-03-23 07:38:12 -08:00
splice.c [PATCH] splice: fix problems with sys_tee() 2006-07-10 11:00:01 +02:00
stat.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
super.c [PATCH] add missing desctiption in super.c 2006-09-06 11:00:01 -07:00
sync.c [PATCH] writeback: fix range handling 2006-06-23 07:42:49 -07:00
xattr_acl.c
xattr.c [PATCH] log more info for directory entry change events 2006-06-20 05:25:28 -04:00